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#if !defined(__cplusplus)
#if (defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)) \
|| defined(__GNUC__) \
|| defined(__INTEL_COMPILER) \
|| defined(__IBMC__) \
#include <complex.h>
#if !defined(_Complex_I)
#error The "complex.h" header does not define the '_Complex_I' macro.
#error Please report this to Cython developers <github.com/cython/cython/issues>
#endif
#elif defined(_MSC_VER)
/* Although the MSVC compilers implementation of complex isn't
compatible with Cython, it shouldn't cause Cython to define
CYTHON_CCOMPLEX. Instead Cython should use it's own complex
implementation.
*/
#include <complex.h>
#endif
#endif
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